default "/boot/config-$UNAME_RELEASE"
default "arch/$ARCH/defconfig"
-menu "Code maturity level options"
+menu "General setup"
config EXPERIMENTAL
bool "Prompt for development and/or incomplete code/drivers"
Maximum of each of the number of arguments and environment
variables passed to init from the kernel command line.
-endmenu
-
-menu "General setup"
config LOCALVERSION
string "Local version - append to kernel release"
section 6.4 of the Linux Programmer's Guide, available from
<http://www.tldp.org/guides.html>.
-config IPC_NS
- bool "IPC Namespaces"
- depends on SYSVIPC
- default n
- help
- Support ipc namespaces. This allows containers, i.e. virtual
- environments, to use ipc namespaces to provide different ipc
- objects for different servers. If unsure, say N.
-
config SYSVIPC_SYSCTL
bool
depends on SYSVIPC
Say N if unsure.
-config UTS_NS
- bool "UTS Namespaces"
+config USER_NS
+ bool "User Namespaces (EXPERIMENTAL)"
default n
+ depends on EXPERIMENTAL
help
- Support uts namespaces. This allows containers, i.e.
- vservers, to use uts namespaces to provide different
- uts info for different servers. If unsure, say N.
+ Support user namespaces. This allows containers, i.e.
+ vservers, to use user namespaces to provide different
+ user info for different servers. If unsure, say N.
config AUDIT
bool "Auditing support"
Say N if unsure.
+config FAIR_GROUP_SCHED
+ bool "Fair group CPU scheduler"
+ default y
+ depends on EXPERIMENTAL
+ help
+ This feature lets CPU scheduler recognize task groups and control CPU
+ bandwidth allocation to such task groups.
+
+choice
+ depends on FAIR_GROUP_SCHED
+ prompt "Basis for grouping tasks"
+ default FAIR_USER_SCHED
+
+config FAIR_USER_SCHED
+ bool "user id"
+ help
+ This option will choose userid as the basis for grouping
+ tasks, thus providing equal CPU bandwidth to each user.
+
+endchoice
+
config SYSFS_DEPRECATED
bool "Create deprecated sysfs files"
default y
config CC_OPTIMIZE_FOR_SIZE
bool "Optimize for size (Look out for broken compilers!)"
default y
- depends on ARM || H8300 || EXPERIMENTAL
+ depends on ARM || H8300 || SUPERH || EXPERIMENTAL
help
Enabling this option will pass "-Os" instead of "-O2" to gcc
resulting in a smaller kernel.
support for "fast userspace mutexes". The resulting kernel may not
run glibc-based applications correctly.
+config ANON_INODES
+ bool
+
config EPOLL
bool "Enable eventpoll support" if EMBEDDED
default y
+ select ANON_INODES
help
Disabling this option will cause the kernel to be built without
support for epoll family of system calls.
+config SIGNALFD
+ bool "Enable signalfd() system call" if EMBEDDED
+ select ANON_INODES
+ default y
+ help
+ Enable the signalfd() system call that allows to receive signals
+ on a file descriptor.
+
+ If unsure, say Y.
+
+config TIMERFD
+ bool "Enable timerfd() system call" if EMBEDDED
+ select ANON_INODES
+ depends on BROKEN
+ default y
+ help
+ Enable the timerfd() system call that allows to receive timer
+ events on a file descriptor.
+
+ If unsure, say Y.
+
+config EVENTFD
+ bool "Enable eventfd() system call" if EMBEDDED
+ select ANON_INODES
+ default y
+ help
+ Enable the eventfd() system call that allows to receive both
+ kernel notification (ie. KAIO) or userspace notifications.
+
+ If unsure, say Y.
+
config SHMEM
bool "Use full shmem filesystem" if EMBEDDED
default y
choice
prompt "Choose SLAB allocator"
- default SLAB
+ default SLUB
help
This option allows to select a slab allocator.
a slab allocator.
config SLUB
- depends on EXPERIMENTAL && !ARCH_USES_SLAB_PAGE_STRUCT
bool "SLUB (Unqueued Allocator)"
help
SLUB is a slab allocator that minimizes cache line usage
and has enhanced diagnostics.
config SLOB
-#
-# SLOB does not support SMP because SLAB_DESTROY_BY_RCU is unsupported
-#
- depends on EMBEDDED && !SMP && !SPARSEMEM
+ depends on EMBEDDED
bool "SLOB (Simple Allocator)"
help
SLOB replaces the SLAB allocator with a drastically simpler
- allocator. SLOB is more space efficient that SLAB but does not
+ allocator. SLOB is more space efficient than SLAB but does not
scale well (single lock for all operations) and is also highly
susceptible to fragmentation. SLUB can accomplish a higher object
density. It is usually better to use SLUB instead of SLOB.
default 0 if BASE_FULL
default 1 if !BASE_FULL
-menu "Loadable module support"
+config PAGE_GROUP_BY_MOBILITY
+ bool "Group pages based on their mobility in the page allocator"
+ def_bool y
+ help
+ The standard allocator will fragment memory over time which means
+ that high order allocations will fail even if kswapd is running. If
+ this option is set, the allocator will try and group page types
+ based on their ability to migrate or reclaim. This is a best effort
+ attempt at lowering fragmentation which a few workloads care about.
+ The loss is a more complex allocator that may perform slower. If
+ you are interested in working with large pages, say Y and set
+ /proc/sys/vm/min_free_bytes to 16374. Otherwise say N
-config MODULES
+menuconfig MODULES
bool "Enable loadable module support"
help
Kernel modules are small pieces of compiled code which can
depends on (SMP && MODULE_UNLOAD) || HOTPLUG_CPU
help
Need stop_machine() primitive.
-endmenu
-menu "Block layer"
source "block/Kconfig"
-endmenu
projects / linux-2.6 / blobdiff